Japanese BBS 2ch suffered a massive cyber attack on March 1 from what was later identified as Korean web users, the day that marks the 91 anniversary of the March 1, 1919 independence movement.
Korea and Japan have had bitter relations throughout history, and this national rivalry was likely to be reheated during the recent figure skating competition at the 2010 Vancouver Winter Olympics. On the website BBS 2ch posted that "Kim Yu-na had bribed the judges." Therefore, Korean netizens decided to attack BBS 2ch.
More than 10,000 S. Korean users coordinated their attacks through S.Korean web communities to attack BBS 2ch. On March 1 at 1:00 PM, thousands of Korean netizens got together to paralyze the main page, board, and other pages on the Japanese website. One Korean netizen who attended the cyber war said, "This is a natural response for what the Japanese site did to Korea."
